Application Security Essentials

Python application security is the practice of designing, building, and maintaining Python software that resists attack from malicious actors. The OWASP Top 10 identifies the most critical security risks in web applications worldwide; mastering defenses against these risks—injection attacks, broken authentication, insecure deserialization, and dependency vulnerabilities—is essential for every Python developer. This series covers real-world exploit scenarios, proven code patterns, and configuration best practices that reduce the attack surface of your applications.

Building secure Python applications does not require advanced cryptography expertise; it requires understanding which built-in functions are unsafe (like pickle.loads() on untrusted input), which libraries prevent common exploits (like parameterized queries in SQLAlchemy), and how to manage secrets and dependencies responsibly. Over the next 10 chapters, you will learn to identify vulnerabilities in code review, write security tests, and harden your Flask, Django, or FastAPI applications against real threats tracked by the OWASP foundation.

Articles in this series​

Articles in this series